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by emergie
899 days ago
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Consider a system with PID driver that samples temperature every 15-30min.
Measures are not 100% regular, so we have to substract dates to calculate time duration between samples.
Lets say we got one measure with timestamp 99-12-31 23:50 and second one with 00-01-01 00:15.
What will calendar code do if we substract 99-12-31 23:50 from 00-01-01 00:15?
Does 00y mean 2000 or 1900?
What will the driver do when suddenly temperature differential will change without relation to physical reality? |
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